- regex101: build, test, and debug regex
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP PCRE, Python, GO, JavaScript, Java, C# NET, Rust
- Regular expression - Wikipedia
The phrase regular expressions, or regexes, is often used to mean the specific, standard textual syntax for representing patterns for matching text, as distinct from the mathematical notation described below
- RegExr: Learn, Build, Test RegEx
RegExr is an online tool to learn, build, test Regular Expressions (RegEx RegExp) Supports JavaScript PHP PCRE RegEx Results update in real-time as you type
- Regular expression syntax cheat sheet - JavaScript | MDN - MDN Web Docs
This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide
- regex - What does ?= mean in a regular expression? - Stack Overflow
?= is a positive lookahead, a type of zero-width assertion What it's saying is that the captured match must be followed by whatever is within the parentheses but that part isn't captured Your example means the match needs to be followed by zero or more characters and then a digit (but again that part isn't captured) Thanks cletus
- Regex Tutorial - A Cheatsheet with Examples - Regextutorial. org
This video course teaches you the Logic and Philosophy of Regular Expressions from scratch to advanced level This is an online Regex tutorial for learning Regular expressions effectively and efficiently with examples and exercises
- RegexOne - Learn Regular Expressions - Lesson 1: An Introduction, and . . .
Learn Regular Expressions with simple, interactive exercises Regular expressions are extremely useful in extracting information from text such as code, log files, spreadsheets, or even documents
- Regular-Expressions. info - Regex Tutorial, Examples and Reference . . .
At Regular-Expressions info you will find a wide range of in-depth information about a powerful search pattern language called regular expressions Quick Start Tutorial
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